New Sig

i am new to photoshop in some way but i saw this site and some of the graphics on it and was shocked there is some awsome work in here and hopefully i can learn most of it but here is my sig please tell me how it look and how i can improve it
ty

 

add a border and blend the pic a bit. it's kinda big but it looks pretty good.

 

i dont know how to add a border tried it but its not coming out right

and yea i think it is kinda big myself can u tell me a good size to use?

 

I use 350x120 ish type...

 

I use 400 x 100 for my sigs sizes and where do you get your brushes from???